RESUMO
The aim of the present study was to evaluate the phenolic contents in capsule and root methanolic extracts of Euphorbia retusa followed by identification of phenolic on capsule extracts through high-performance liquid chromatography (HPLC- DAD) for the first time. Likewise, the antioxidant activity of both extracts was investigated by using Cupric reducing antioxidant capacity (CUPRAC). The result implies that E. retusa capsules have the highest phenolic and flavonoid contents with 105.33 ± 7.75 µg GAE.mg-1 extract 19.95 ± 0.96 µg QEs.mg-1 extract; respectively and the highest activity in CUPRAC assay with epigallocatechin 3-O-Gallate was the major flavonoid. Thus, our findings indicate that E. restusa capsules may be valorized in industrial fields.
Assuntos
Antioxidantes/química , Antioxidantes/farmacologia , Euphorbia/química , Fenóis/farmacologia , Extratos Vegetais/farmacologia , Cápsulas , Catequina/análogos & derivados , Catequina/análise , Cromatografia Líquida de Alta Pressão , Avaliação Pré-Clínica de Medicamentos , Flavonoides/análise , Fenóis/análise , Fenóis/química , Extratos Vegetais/químicaRESUMO
This study compared phenolic contents and antioxidant activity in different organs of Acacia albida (leaves and bark) and focuses on identification of phenolic compounds of leaves by HPLC-DAD. The analysed organs exhibited differences in total polyphenol contents (100 and 59.5 mg GAE g(-1) DW). Phenolic contents of leaves were two times higher than those in bark. Ethanolic extracts exhibited good antioxidant activities with IC50 = 26 µg mL(-1) for DPPH and EC50 = 50 µg mL(-1) for FRAP. Identification by HPLC-DAD revealed the presence of nine phenolic compounds known for their high antioxidant activity. The results suggested that this species can be used as source of natural antioxidants.